This brief comparative analysis of the Islamic belief system is written from a committed biblical Christian's perspective without apology. Nevertheless, we have sought to state significant orthodox Islamic doctrines, traditions, and practices in this booklet as accurately as possible in accordance with supporting texts contained in the Qur'an and the Hadith. As we do so, we respond as necessary with explanatory comments as well as statements of opposing biblical Christian doctrine within an expanded series of footnotes. In the first part of this booklet we discuss the origin and history of Islam, followed by a brief discussion of its leading major sects, various sub-sects and many offshoots existing in today's world. In the second portion of this booklet we begin a discussion of Islamic theology, revealing the various ways in which Islam's doctrines and traditions deviate from sound biblical teaching. We conclude the booklet with a summary in which we ponder various conclusions derived from our analysis.